Apparatus for controlling the flow of fluids.



v I s. 000K. APPARATUS FOR CONTROLLING THE PLOW OF FLUIDS.

I APPLIOATION FILED AUG. 28,1903.

930,843. Patented Aug. 10, 1909.

2 SHEETS-SHEET 1.

Z5 w I 13 'W'infss es; I [nay-aw WM m m v S. COOK. APPARATUS FOR CONTROLLING THE FLOW 0F FLUIDS.

APPLIOATION FILED AUG.28,1903.

INVENTOR. W 160%. By 4 M ATTORIVEYL WITNESSES. I

"p fifofwx I To all whom time/y concern:

citizenof the United States, of Wilm'erding,

- and connected to can be supplie tlon. v lily invention consists of a device for-coir .trollmg the flow oiia air com ressor o Pipe-10, 10, connects cy 11 in which operates piston 12 is astem 14 piston 12 valve 16 has been there results a reduction of pressue on the Iran s rn ras PA and ons r en OF PITTSBURG, PENNSYLVANIA. nrzenna'rus son conrnonnnm 'rrm snow or names.

Be it known that I, SAMUEL 0001:, a and a resident in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in App ratus for Controlling the Flow of Fluids, of which the following is a specificafluid neither gaseous or li uid al'on' a pipe byopening or closing a v8. ve inclu ed in said PIPE.

It is the supply of air tothe compression cylinder of an a1rcompressor or the steam supply ob the engine driving the air compressor. 4

he accompanying two figures of the drawings illustrate apparatus constructed in accordance with my invention.

v Referringtol i re 1,1 isthe cylinder of an any convenienttype which is supp led through pipe 2 with air which is discharged through pipe 3 into a receiver 5 isa chamber opening tothe atmosphere pipe 2' and in'this chamber a valve 6 is located which position would close chamber 5 from the atmosphere. Valve 6 is connectedby a stem 7 to a piston 8 aud o crates in cylinders. inder 9 with cylinder provided with a'leakagegroove 13 extending therethrough and with a stem 1 projecting from its underside and arranged to close a port 15 connecting pop-valve 16 adjustable by means of a spring 17' and set-screw 18 to blow oil at any desired ressure. Pi e 19 connects receiver 4. and cy inder 11 at a oint below piston 12, and leakage roove 13 serves to equalize the air pressure a ove and below pistonfl2 but inasmuch as the area hi the under side of piston 12 is less than t e area of the upper side, owing :to the. pro ectin is forced downw dan port 15 is closed. Whenever the prcsure in .receiver 4 reaches set the pop opus and 16can tap of iston '12, inasmuch as-po r= ie ressure much fastr thanit ve t are air Consequently piston 12 rises, oping port ieaadpermittmg air under press re to pass s ec-insurance Letters Eatent. Application filed nugastzs, 1983. Serialiio. 171,956.

v through pipe 10,

particularly'adapted for controlling supply of exact accord. to the demands made upon rbthrough piping 23.

in its upward,

' automatically-actuated a piston 12 which is with pipe 10. Above the piston 32. The piston the point at whi h-pop-' prises a disk, by small leakage move 13.

Eatented Aug. 10, 1909.

10, and under iston 8 in cylin er 9 iorcin'g valve 6 upwar to its seat and closing the supply of air to chamber 5, thus cutting 05 the air supply to the compressor cylinder. l'V-hen the pressure in receiverd has fallen t9 such a point that popvalve 16 closes, above piston 12, causing it to move down ward and close port 15. The weight of piston System 7 and valve 6 being suflicient to cause valve 6 to open, the air in cylinder 9 below piston 8 escapes through a small cock 20 arranged for that purpose. In practice I find that the operation of this apparatus is such that valve 6 moves backward and forward or pulsates thereby controlling the air to compression cylinder 1 in ccivcr 4 for air.

' Referring to Fig. 2: an air compressor cylinder 21 is connected in tandem to a steam cylinder 22, which is supplied with steam The piping 23 is provided with a hand operated controlling valve 24 and an automatically-actuated double beat valve 25,which is actuatedby the fluid head or pressure delivered by the compressor cylinder 21 to a recelver26. The receiver pressure is'transniitted through a pipe 27 to an controlling device of the valve 25. The valve is mounted on a stem 28, which is provided at. its upper end with a piston 29 which operates in a cylinder 30. A spring 31, surrounding the valvestem, operates to hold the val-ve25 open and fluid pressure, which is delivered by the controlling device to the cylinder 30 above the piston, operates inopposition to the sprin to close the valve. The automatic control ing device Consists of a piston 32, which closes con munication between the receiver 26 and the cylinder 30, and a pop or blow-oil valve 33, which relievesthe'receiver of excess pres sure and which also controls the operation of 32 operates within a cylinder 34 and is provided with a downpoitBGdeading into the cylinder 30. The pipe 27 communicates with the cylinder 34 and the top of the cylinder is closed by means of the pop valve 33.

which is held on a seat formed on the wall and which is air pressure will accumulate 'wardly projecting stem 35 which closes a The pop valve Cr)n1- of the cylinder by a spring 38 exposed on its lower face to the pressu -g within thejvylinder 34. A leakage groove or orifice 39 extends through the pis ton 32 and serves to equalize the pressure above and. below the piston and also to transmit the receiver pressure to the lower face of the disk 33 of the pop valve. Inasmuch as theend of the stem 35, which closes the port 36, is exposed to the pressure of the cylinder 30 When the port is closed, the piston 32 is held downwardly by the unbalanced fluid pressure with sutlicient force to'close the port 36 and prevent fluid leakage therethrough.

The operation of the apparatus is as follows: Steam is admitted to the cylinder 22, which comprises the steam end of the compressor, through the piping 23, the hand operated valve 24 and the automatically-operated valve 25, which is, under ordinary conditions, held open by the spring 31. The air cylinder 21 of the compressor delivers compressed air to the receiver 26 through a ipe 4:1 and the pressure in the receiver is transmitted, through the pipe '27, to the cylindert34 of the controlling device, where it operates against the disk 33 of the pop valve.

in opposition to the spring 38 and also operates against the piston 32 to close the port 36. The spring 38 is so designed, and may also be so adjusted by an adjustable screw 42 that when the pressure in the receiver 26 reaches or exceeds a predetermined pressure, the pressure in'the cylinder 34 will littthe disk 33 and permit. air to escape from the cylinder 34:. The leaka e passage or orifice 39 is of such size, relative to the port of the puppet valve and to the sectional area of the pipe 27, that the flow of fluid through it is restricted. \Vhen the puppet valve 33 is open the pressure above the piston 39 is reduced since the puppet valve can discharge air faster than the orifice 39 can supply it and consequently the piston 32 is raised by the air pressure below it and the port 36 is opened, thereby admitting air under pressure to the cylinder 30. The air pressure admitted to the cylinder 30, opcratingagainst ..the pistoni'Qt), compresses the spring an amount corresponding to the degree of air pressure and partially or wholly closing the valve-25. The valve controls the flow of steam tothc cylinder 22 and coiiscqucntly the'operation' of the comprcssor is automatically controlled by the air pressure within the receiver 96. att'tcr the pressure in the receiv'er 26 has fallen below the predettn'n-iincd pressure, the pop valve 33 iscloscd bytbc spring 38,,tho pressure in the cylinder 34 is equalized on eaeh side of the piston 32 by means of the orifice 3t) and the piston 32 is moved dmvnwardly by its own weight and closes the port 36 where it is held in position by tbe-nnbalanded pressure, as before dcscribed. The piston 29 is then forced upwardly by the spring 31, the air in the cylinder 30 being discharged through a small oritice l3 and the valve 25 is againopened a maximum amount. The pop valve 33, during its operation,-pulsates and consequently causes the piston 32 to periodically open and close the port 36, which causes the valve 25 to pulsate. The pulsations of the valve 33 are caused by the restricted flow of fluid through the port 39.

It will be seen that the air pressure in the receiver 26, through the agency of the controlling device and the valve 25, automatically controls the operation of the compressor. The pressure admitted to the cylinder 30 through the port 36 will hold the valve in difl'erent )ositions which correspond to the amount oi pressure in the receiver.

lVhat I claim as new and useful and desire to secure by Letters Patent is:

1. In combination with a compressor, a receiver receiving fluid therefrom, a blow-off valve for said receiver, a fluid-actuated supply valve controlling the delivery of fluid to said compressor, a normally balanced controlled valve controlling the delivery of actuating fluid to said supply valve and provided with means whereby it is unbalanced and caused to deliver actuating fluid to the supply when said blow-off valve is opened.

2. In combination with a compressor, a receiver, a fluid-actuated receiving valve controlling the delivery of fluid to said compressor, a blow-ofl valve responsive to receiver pressure, and a valve controlling the delivery of actuating fluid to one of said valves. i

3. In combination with a compressor, a receiver, a fluid-actuated reciprocatin valve' to receiver pressure, and a valve respons ve to the operation of said. blow-01f valve for delivering actuatingfluid to said rccipro-' mating valve.

Signed at Pittsbnr", in the county of Allegln'hy. and State of ennsylvania, this 19th day ,of August A. I). 1003.

i SAMUEL COOK. lVitnesses:

' J. A. ADAMS, H. C. Bamn'rr. 

